P1893 — Engine Torque Signal Low Voltage

What Does P1893 Mean?

P1893 is a manufacturer-specific diagnostic trouble code: Engine Torque Signal Low Voltage. This code applies to BUICK, CADILLAC, CHEVY, GM, GMC vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1893

⚠️ Check Engine Light (MIL) illuminated
⚠️ Abnormal signal from Engine Torque
⚠️ Related system may operate erratically
⚠️ Reduced engine performance

Common Causes

🔍 Engine Torque producing abnormal signal
🔍 Electromagnetic interference affecting Engine Torque signal
🔍 Wiring issue distorting Engine Torque signal

Frequently Asked Questions

What does P1893 mean?

P1893 indicates: Engine Torque Signal Low Voltage. The vehicle's computer has detected that the Engine Torque is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1893?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1893 for extended periods may cause additional problems.

How much does it cost to fix P1893?

Repair costs for P1893 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Engine Torque and related wiring
🔧 Replace faulty Engine Torque

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1893: Engine Torque Signal Low Voltage